import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:im_flutter_sdk/im_flutter_sdk.dart';

import '../../../generated/assets.dart';
import 'emoji_text_widget.dart';

class TextItem extends StatelessWidget {
  final EMTextMessageBody textBody;
  final bool isSentByMe;
  final bool showTime;
  final String formattedTime;
  final EMMessage message; // 添加消息对象以获取状态
  final VoidCallback? onResend; // 添加重发回调

  const TextItem({
    required this.textBody,
    required this.isSentByMe,
    required this.showTime,
    required this.formattedTime,
    required this.message,
    this.onResend,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        // 显示时间
        if (showTime) _buildTimeLabel(),
        Container(
          padding: EdgeInsets.symmetric(
            horizontal: 16.w,
            vertical: 8.h,
          ),
          child: Row(
            mainAxisAlignment: isSentByMe ? MainAxisAlignment.end : MainAxisAlignment.start,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              if (!isSentByMe) _buildAvatar(),
              if (!isSentByMe) SizedBox(width: 8.w),
              // 发送消息时，状态在左侧，与消息气泡垂直居中对齐
              if (isSentByMe) 
                Align(
                  alignment: Alignment.center,
                  child: Container(
                    margin: EdgeInsets.only(top: 10.h),
                    child: _buildMessageStatus(),
                  ),
                ),
              if (isSentByMe) SizedBox(width: 10.w),
              Container(
                constraints: BoxConstraints(maxWidth: 240.w),
                margin: EdgeInsets.only(top: 10.h),
                padding: EdgeInsets.symmetric(
                  horizontal: 12.w,
                  vertical: 8.h,
                ),
                decoration: BoxDecoration(
                  color: isSentByMe ? Color(0xff8E7BF6) : Colors.white, // 发送方紫色，接收方白色
                  borderRadius: BorderRadius.only(
                    topLeft: isSentByMe ? Radius.circular(12.w) : Radius.circular(0),
                    topRight: isSentByMe ? Radius.circular(0) : Radius.circular(12.w),
                    bottomLeft: Radius.circular(12.w),
                    bottomRight: Radius.circular(12.w),
                  ),
                ),
                child: EmojiTextWidget(
                  text: textBody.content,
                  textStyle: TextStyle(
                    fontSize: 14.sp,
                    color: isSentByMe ? Colors.white : Colors.black, // 发送方白色文字，接收方黑色文字
                  ),
                  emojiSize: 24.w,
                ),
              ),
              if (isSentByMe) SizedBox(width: 8.w),
              if (isSentByMe) _buildAvatar(),
            ],
          ),
        ),
      ],
    );
  }

  // 构建时间标签
  Widget _buildTimeLabel() {
    return Container(
      alignment: Alignment.center,
      padding: EdgeInsets.symmetric(
        horizontal: 16.w,
      ),
      child: Container(
        padding: EdgeInsets.symmetric(
          horizontal: 12.w,
        ),
        child: Text(
          formattedTime,
          style: TextStyle(
            fontSize: 12.sp,
            color: Colors.grey,
          ),
        ),
      ),
    );
  }

  // 构建头像
  Widget _buildAvatar() {
    return Container(
      width: 40.w,
      height: 40.w,
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(20.w),
        image: DecorationImage(
          image: AssetImage(Assets.imagesAvatarsExample),
          fit: BoxFit.cover,
        ),
      ),
    );
  }

  // 构建消息状态（发送中、已发送、失败重发）
  Widget _buildMessageStatus() {
    // 只对发送的消息显示状态
    if (!isSentByMe) {
      return SizedBox.shrink();
    }

    // 检查消息状态
    final status = message.status;
    
    if (status == MessageStatus.FAIL) {
      // 发送失败，显示重发按钮
      return GestureDetector(
        onTap: onResend,
        child: Container(
          width: 20.w,
          height: 20.w,
          decoration: BoxDecoration(
            color: Colors.red.withOpacity(0.1),
            shape: BoxShape.circle,
          ),
          child: Icon(
            Icons.refresh,
            size: 14.w,
            color: Colors.red,
          ),
        ),
      );
    } else if (status == MessageStatus.PROGRESS) {
      // 发送中，显示加载动画
      return Container(
        width: 16.w,
        height: 16.w,
        child: CircularProgressIndicator(
          strokeWidth: 2,
          valueColor: AlwaysStoppedAnimation<Color>(
            Colors.grey,
          ),
        ),
      );
    } else {
      // 发送成功，不显示任何状态
      return SizedBox.shrink();
    }
  }
}